def oflush(self, n=255):
t = 5000
while t:
self.i2c.readfrom_into(self.i2c_addr + 1, self.buf1)
r = self.buf1[0]
if r >= n:
return
t -= 1
machine.idle()
raise OSError(uerrno.ETIMEDOUT)
def connect_to_wlan(wlan):
# try connecting to wifi until succeeding
while True:
try:
wlan.connect(WIFI_SSID, auth=WIFI_AUTH, timeout=7500)
while not wlan.isconnected():
machine.idle()
return
except OSError:
pass
def connect_wifi(cfg=None):
if not cfg:
from config import Config
cfg = Config.load(debug=True)
from network import WLAN
import machine
print('Starting WLAN, attempting to connect to ' + cfg.wifi_ssid)
wlan = WLAN(0, WLAN.STA)
wlan.ifconfig(config='dhcp')
wlan.connect(ssid=cfg.wifi_ssid, auth=(WLAN.WPA2, cfg.wifi_key))
while not wlan.isconnected():
machine.idle()
print('Connected')
def send_command(self, ins, p1, p2, data=None, expected=None):
# These command variables are always sent
cmd = struct.pack('3B', ins, p1, p2)
# Looks like data is only sent with the length (Lc)
if data:
assert len(data) <= 251 # Thus speaks the datasheet
cmd += struct.pack('B', len(data))
cmd += data
# Expected data is either not present at all, 0 for null-terminated, or a number for fixed
if expected is not None:
cmd += struct.pack('B', expected)
if self.debug:
print("Sending: " + hexlify(cmd).decode())
self.spi.write(cmd)
# Wait for a little while
time.sleep_us(15) # This should take at most 14.5us
while self.tc_busy_bar() == 0:
machine.idle()
# Request a response
if expected is not None:
if expected > 0:
result_bytes = self.spi.read(2 + expected)
else:
result_bytes = self.spi.read(EPD.MAX_READ)
strlen = result_bytes.find(b'\x00')
result_bytes = result_bytes[:strlen] + result_bytes[strlen+1:strlen+3]
else:
result_bytes = self.spi.read(2)
if self.debug:
print("Received: " + hexlify(result_bytes).decode())
(result,) = struct.unpack_from('>H', result_bytes[-2:])
if result != EPD.SW_NORMAL_PROCESSING:
raise ValueError("Bad result code: 0x%x" % result)
return result_bytes[:-2]
def read(self):
# wait for the device being ready
while self.pOUT() == 1:
idle()
# shift in data, and gain & channel info
result = 0
for j in range(24 + self.GAIN):
state = disable_irq()
self.pSCK(True)
self.pSCK(False)
enable_irq(state)
result = (result << 1) | self.pOUT()
# shift back the extra bits
result >>= self.GAIN
# check sign
if result > 0x7fffff:
result -= 0x1000000
return result
def connect_wifi(self):
from network import WLAN
if not self.cfg:
raise ValueError("Can't initialise wifi, no config")
self.log('Starting WLAN, attempting to connect to ' + ','.join(self.cfg.wifi.keys()))
wlan = WLAN(0, WLAN.STA)
wlan.ifconfig(config='dhcp')
while not wlan.isconnected():
nets = wlan.scan()
for network in nets:
if network.ssid in self.cfg.wifi.keys():
self.log('Connecting to ' + network.ssid)
self.feed_wdt() # just in case
wlan.connect(ssid=network.ssid, auth=(network.sec, self.cfg.wifi[network.ssid]))
while not wlan.isconnected():
idle()
break
self.feed_wdt() # just in case
sleep_ms(2000)
self.log('Connected as %s' % wlan.ifconfig()[0])
import machine
from network import WLAN
wlan = WLAN() # get current object, without changing the mode
if machine.reset_cause() != machine.SOFT_RESET:
wlan.init(mode=WLAN.STA)
# configuration below MUST match your home router settings!!
wlan.ifconfig(config=('192.168.178.107', '255.255.255.0', '192.168.178.1', '8.8.8.8'))
if not wlan.isconnected():
# change the line below to match your network ssid, security and password
wlan.connect('mywifi', auth=(WLAN.WPA2, 'mywifikey'), timeout=5000)
while not wlan.isconnected():
machine.idle() # save power while waiting
def flash_wait_not_busy():
while stm.mem32[stm.FLASH + stm.FLASH_SR] & 1 << 16:
machine.idle()
bt.deinit()
print('Switching off LoRa')
lora = LoRa(mode=LoRa.LORAWAN, region=LoRa.EU868, power_mode=LoRa.SLEEP)
if (uos.uname().sysname == 'FiPy'):
# print('Switching off LTE')
# lte = network.LTE()
# quit = False
# while quit == False:
# try:
# lte.deinit()
# except uosError:
# print(' Exception occured, retrying...')
# pass
# else:
# quit = True
print('Switching off Sigfox')
sigfox = Sigfox(mode=Sigfox.SIGFOX, rcz=Sigfox.RCZ1)
print('Switching off RGB Led')
pycom.rgbled(0x000000)
print('===============================================================================')
print('Now entering idle mode... ')
while True:
machine.idle()# Nothing
####################################
def wait_connection():
sta_if = network.WLAN(network.STA_IF)
while not sta_if.isconnected():
machine.idle()
def enable(self):
self.tc_en_bar.value(0) # Power up
time.sleep_ms(5)
while self.tc_busy_bar() == 0:
machine.idle() # will it wake up here?
def runLoop():
motor_H.off()
motor_V.off()
while True:
blynk.run()
machine.idle()
def connect_station(self, network):
network_name = network['ssid']
log.info('WiFi STA: Prepare connecting to network "{}"'.format(
network_name))
auth_mode = self.get_auth_mode(network_name)
log.info(
'WiFi STA: Attempt connecting to network "{}" with auth mode "{}"'.
format(network_name, auth_mode))
password = network['password']
# TODO: Optionally, configure hostname.
# https://docs.micropython.org/en/latest/library/network.WLAN.html
# https://github.com/pycom/pycom-micropython-sigfox/pull/165
# https://forum.pycom.io/topic/3326/new-firmware-release-v1-18-0
if 'dhcp_hostname' in network:
if hasattr(self.station, 'config'):
log.ingo('WiFi STA: Using dhcp_hostname "{}"'.format(
network['dhcp_hostname']))
self.station.config(dhcp_hostname=network['dhcp_hostname'])
else:
log.error('Could not set hostname on older MicroPython')
# Optionally, configure static IP address.
if 'ifconfig' in network:
log.info(
'WiFi STA: Using static network configuration "{}"'.format(
network_name))
self.station.ifconfig(config=network['ifconfig'])
# Obtain timeout value.
network_timeout = network.get('timeout', 15.0)
# Set interval how often to poll for WiFi connectivity.
network_poll_interval = 800
# Connect to WiFi station.
log.info(
'WiFi STA: Starting connection to "{}" with timeout of {} seconds'.
format(network_name, network_timeout))
self.station.connect(network_name, (auth_mode, password),
timeout=int(network_timeout * 1000))
# Wait for station network to arrive.
# ``isconnected()`` returns True when connected to a WiFi access point *and* having a valid IP address.
retries = int(network_timeout * network_poll_interval)
while not self.station.isconnected() and retries > 0:
log.info(
'WiFi STA: Waiting for network "{}".'.format(network_name))
retries -= 1
# Save power while waiting.
machine.idle()
# Feed watchdog.
self.manager.device.feed_watchdog()
# Don't busy-wait.
time.sleep_ms(network_poll_interval)
if not self.station.isconnected():
raise WiFiException(
'WiFi STA: Unable to connect to "{}"'.format(network_name))
# Inform about networking status.
self.print_short_status()
self.print_address_status()
return True
def start_real(self):
"""
https://docs.pycom.io/tutorials/all/wlan.html
https://github.com/pycom/pydocs/blob/master/firmwareapi/pycom/network/wlan.md
"""
#if machine.reset_cause() == machine.SOFT_RESET:
# print("WiFi STA: Network connection after SOFT_RESET.")
# self.print_short_status()
# # Inform about networking status.
# self.print_address_status()
# return True
# Save the default ssid and auth for restoring AP mode later
#original_ssid = self.station.ssid()
#original_auth = self.station.auth()
# Inform about networking status.
self.print_address_status()
# Setup network interface.
log.info("WiFi STA+AP: Starting interface")
self.station.mode(WLAN.STA_AP)
self.station.init()
# Check WiFi connectivity.
if self.is_connected():
log.info(
"WiFi STA: Network connection already established, will skip scanning and resume connectivity."
)
self.print_short_status()
# Give system some breath.
time.sleep(0.25)
# Inform about networking status.
self.print_short_status()
self.print_address_status()
return True
# Prepare information about known WiFi networks.
networks_known = frozenset(
[station['ssid'] for station in self.stations])
# Attempt to connect to known/configured networks.
attempt = 0
while True:
delay = 1
if self.is_connected():
attempt = 0
else:
log.info(
"WiFi STA: Connecting to configured networks: %s. Attempt: #%s",
list(networks_known), attempt + 1)
try:
self.connect_stations(networks_known)
except:
log.exception(
'WiFi STA: Connecting to configured networks "{}" failed'
.format(list(networks_known)))
delay = backoff_time(attempt, minimum=1, maximum=600)
log.info('WiFi STA: Retrying in {} seconds'.format(delay))
attempt += 1
machine.idle()
time.sleep(delay)
# Todo: Reenable WiFi AP mode in the context of an "initial configuration" mode.
"""
def runLoop():
while True:
blynk.run()
machine.idle()
def wait_for_event(event, timeout_ms):
t0 = time.ticks_ms()
while last_event != event and time.ticks_diff(time.ticks_ms(), t0) < timeout_ms:
machine.idle()
def start_transmissions(_pkts):
global lora
global index
global lora_sock
global active_tx
global active_rx
global chrono
global my_slot
global proc_gw
global AppSKey
global succeeded
global retrans
global dropped
global join_start
global guard
global sack_rcv
global msg
global sack_bytes
airt = int(airtime_calc(my_sf,1,packet_size+2,my_bw_plain)*1000)
duty_cycle_limit_slots = math.ceil(100*airt/(airt + 2*guard))
proc_and_switch = 12000 # time for preparing the packet and switch radio mode (us)
if (int(MY_ID) == 22 or int(MY_ID) == 34): # fipy nodes switch faster
proc_and_switch = 10000
chrono.reset()
if (my_slot == -1):
join_start = chrono.read_us()
join_request(my_sf)
else:
sync()
repeats = 0
clock_correct = 0
sync_slot = int(airtime_calc(my_sf,1,sack_bytes+2,my_bw_plain)*1000+guard+proc_gw)
clocks = [sync_slot]
print("-----")
print("MY SLOT:", my_slot)
print("Net size:", index)
print("Time on air (ms):", airt/1000)
print("Guard time (ms):", guard/1000)
print("Duty cycle slots:", duty_cycle_limit_slots)
print("SACK slot length (ms):", sync_slot/1000)
print("Gw processing time (ms):", int(proc_gw/1000))
print("Time after SACK rec (ms):", (chrono.read_us()-sack_rcv)/1000)
# send data
i = 1
(succeeded, retrans, dropped, active_rx, active_tx) = (0, 0, 0, 0.0, 0.0)
print("S T A R T")
while(i <= _pkts): # stop after pkts # of packets
print(i, "----------------------------------------------------")
chrono.reset()
start = chrono.read_us()
pycom.rgbled(green)
print("starting a new round at (ms):", start/1000)
# calculate the time until the sack packet
if (int(index) > duty_cycle_limit_slots):
round_length = math.ceil(int(index)*(airt + 2*guard))
else:
round_length = math.ceil(duty_cycle_limit_slots*(airt + 2*guard))
round_length += proc_gw # gw proc+switch time (us)
t = int(my_slot*(airt + 2*guard) + guard - proc_and_switch) # sleep time before transmission
print("sleep time (ms):", t/1000)
pycom.rgbled(off)
time.sleep_us(t)
_thread.start_new_thread(generate_msg, ())
pycom.rgbled(red)
on_time = chrono.read_us()
lora.init(mode=LoRa.LORA, tx_iq=True, region=LoRa.EU868, frequency=freqs[my_sf-5], power_mode=LoRa.TX_ONLY, bandwidth=my_bw, sf=my_sf, tx_power=14)
pkg = struct.pack(_LORA_PKG_FORMAT % len(msg), MY_ID, len(msg), msg)
print("Sending packet of", len(pkg), "bytes at (ms):", (chrono.read_us()-start)/1000)
lora_sock.send(pkg)
# print(lora.stats())
pycom.rgbled(off)
lora.power_mode(LoRa.SLEEP)
active_tx += (chrono.read_us() - on_time)
t = int(round_length - (chrono.read_us() - start) - clock_correct)
if t < 0:
t = 0
print("cannot align clock!")
print("sleep time after data (s):", t/1e6, "/ clock correction (ms):", clock_correct/1000)
machine.idle()
time.sleep_us(t)
sync_start = chrono.read_us()
if (i % sync_rate == 0): # SACK
rec = 0
sack_rcv = 0
acks = ""
lora_sock.setblocking(False)
lora.init(mode=LoRa.LORA, rx_iq=True, region=LoRa.EU868, frequency=freqs[my_sf-5], power_mode=LoRa.ALWAYS_ON, bandwidth=my_bw, sf=my_sf)
print("started sync slot at (ms):", (sync_start)/1000)
pycom.rgbled(white)
while (rec == 0) and ((chrono.read_us() - sync_start) < sync_slot):
machine.idle()
sack_rcv = chrono.read_us()
recv_pkg = lora_sock.recv(30)
if (len(recv_pkg) > 2):
recv_pkg_len = recv_pkg[1]
recv_pkg_id = recv_pkg[0]
if (int(recv_pkg_id) == (my_sf-5)):
sack_rcv = chrono.read_us()
dev_id, leng, s_msg = struct.unpack(_LORA_RCV_PKG_FORMAT % recv_pkg_len, recv_pkg)
s_msg = str(s_msg)[2:]
s_msg = s_msg[:-1]
(index, proc_gw, acks) = s_msg.split(":")
(index, proc_gw) = (int(index), int(proc_gw)*1000)
print("SACK received!", s_msg)
print(lora.stats())
lora.power_mode(LoRa.SLEEP)
active_rx += (chrono.read_us() - sync_start)
clock_correct = 0
if (acks != ""):
acks = zfill(bin(int(acks, 16))[2:], index)
if (acks[my_slot] == "1"):
print("ACK!")
succeeded += 1
repeats = 0
else:
print("I will repeat the last packet")
retrans += 1
repeats += 1
i -= 1
if (repeats == 4):
print("Packet dropped!")
repeats = 0
dropped += 1
retrans -= 1
i += 1
machine.idle()
rec = 1
ack_lasted = (chrono.read_us()-sync_start)
if (ack_lasted > sync_slot + guard): # this is a hardware bug
print("The clock went for a walk...", (ack_lasted-sync_slot)/1000, "ms of misalignment!")
time.sleep_us(round_length-100000) # sorry, we'll miss one round
sync()
clock_correct = -1
elif (ack_lasted < sync_slot/3): # normally this should't happen
print("warning! very short SACK length (ms):", (chrono.read_us()-sync_start)/1000)
time.sleep_us(sync_slot - int(chrono.read_us()-sync_start) + 0) # this must be tuned on
else: # adaptive SACK slot length
if (i == 1): # what if the first packet is dropped. I have to fix this
clocks = [ack_lasted]
else:
clocks.append(ack_lasted)
sync_slot = 0
for j in clocks:
sync_slot += j
sync_slot = int(sync_slot/len(clocks))
if (len(clocks) == 10):
clocks = [sync_slot]
print("new sync slot length (ms):", sync_slot/1000)
if (rec == 0):
lora.power_mode(LoRa.SLEEP)
active_rx += (chrono.read_us() - sync_start)
print("I will repeat the last packet")
retrans += 1
repeats += 1
i -= 1
if (repeats == 4):
print("Packet dropped!")
print("Synchronisation lost!")
repeats = 0
dropped += 1
retrans -= 1
i += 1
pycom.rgbled(red)
sync()
clock_correct = -1
print("sync slot lasted (ms):", (chrono.read_us()-sync_start)/1000)
tas = chrono.read_us()-sack_rcv+2000 # add 2ms for proc after that point
print("time after SACK (ms):", tas/1000)
if (tas < 13000):
print("Warning! time after SACK was short!")
time.sleep_us(int(13000-tas))
print("corrected time after SACK (ms):", (chrono.read_us()-sack_rcv)/1000)
print("transmitted/delivered/retransmitted/dropped:", i, succeeded, retrans, dropped)
# f.write('transmitted/delivered/retransmitted: %d / %d / %d\n' % (i, succeeded, retrans))
rl = chrono.read_us()-start
print("round lasted (ms):", rl/1000)
print("radio active time (rx/tx) (s):", active_rx/1e6, "/", active_tx/1e6)
if (rl > round_length+sync_slot+13000+proc_and_switch) and (clock_correct == 0):
print("Warning! frame lasted longer than expected!")
clock_correct = rl - (round_length+sync_slot+13000+proc_and_switch)
print("corrected round lasted (ms):", (chrono.read_us()-start)/1000)
i += 1
# send out stats
print("I'm sending stats")
stat_msg = str(i-1)+":"+str(succeeded)+":"+str(retrans)+":"+str(dropped)+":"+str(active_rx/1000)+":"+str(active_tx/1000)
pkg = struct.pack(_LORA_PKG_FORMAT % len(stat_msg), MY_ID, len(stat_msg), stat_msg)
for x in range(3): # send it out 3 times (watch out for collision in case of many nodes. I have to fix this)
lora.init(mode=LoRa.LORA, tx_iq=True, region=LoRa.EU868, frequency=freqs[7], power_mode=LoRa.TX_ONLY, bandwidth=LoRa.BW_125KHZ, sf=12, tx_power=7)
pycom.rgbled(blue)
while (lora.ischannel_free(-90) == False):
print("Channel is busy!")
random_sleep(2)
lora_sock.send(pkg)
lora.power_mode(LoRa.SLEEP)
random_sleep(2)
pycom.rgbled(off)
def wait_while_idling(seconds):
then = time.time() + seconds
while then > time.time():
machine.idle()
def wifi_connect():
wlan.connect(ssid, auth=(WLAN.WPA2, password), timeout=5000)
while not wlan.isconnected():
machine.idle()
cfg = wlan.ifconfig()
print('WLAN connected to ip {} gateway {}'.format(cfg[0], cfg[2]))
def wait_until_not_busy(self):
"""Waits until display is ready (until BUSY_N is high)"""
while self.is_busy:
idle()
def wait_not_busy(self):
while stm.mem32[self._sr] & self._sr_busy:
machine.idle()
def flash_wait_not_busy():
while stm.mem32[stm.FLASH + stm.FLASH_SR] & 1 << 16:
machine.idle()
def mainloop(self, stopOnError=False):
now = 0
while True:
if time.ticks_ms() <= now:
continue
if self.ready:
# fix current millis, before start of task
now = time.ticks_ms()
task = self.ready[0] # peek queue
if task.time2run <= now:
if task.period > 0:
task.time2run += task.period
else:
task.time2run = now
#log.info ("Memory free: %d" , gc.mem_free() )
self.ready.pop(0) # remove item for queue
# rq = "queue: "
# for t in self.ready:
# rq = "%s %s %d" % (rq,t.name,t.tid)
# log.info (rq)
log.trace("Running task %s , %d , %d", task.name, task.tid,
task.time2run)
result = None
try:
result = task.run()
except StopIteration:
self.exit(task)
continue # do not reschedule current task
except Exception as e:
tup = e.args
log.warn("Task %s: Exception: %s %s ", task.name,
e.__class__, tup)
if stopOnError:
raise e
if result:
if isinstance(result, Streamer):
mask = select.POLLIN
if isinstance(result, StreamWait):
# task will be rescheduled by the poller
continue # do not reschedule current task
elif isinstance(result, StreamReader):
pass
elif isinstance(result, StreamWriter):
mask = select.POLLOUT
elif isinstance(result, StreamReaderWriter):
mask |= select.POLLOUT
# task will be rescheduled by the poller
fd = result.fd
log.debug("Registered stream")
self.poll.register(fd, mask)
self.io_waiting_task[task] = fd
if isinstance(result, Tasker):
# All taskers will be rescheduled!
if isinstance(result, GetTaskRef):
task.params = task
elif isinstance(result, Wait):
task.time2run -= task.period
task.time2run += result.timeout
elif isinstance(result, AddTask):
task = result.task
self.taskmap[task.tid] = task
self.schedule(task)
elif isinstance(result, WaitTask):
result = self.waitforexit(task, result.tid)
task.params = result
# If waiting for a non-existent task,
# reschedule current task now
if result:
continue
elif isinstance(result, CreateTask):
log.debug("CreateTask called by: %s ",
task.name)
tid = self.task(result.target, result.name,
result.prio, result.period,
result.time2run)
task.params = tid
elif isinstance(result, KillTask):
log.debug("KillTask called by:%s ", task.name)
kill = self.taskmap.pop(result.tid, None)
if kill:
kill.target.close()
task.params = True
else:
task.params = False
elif isinstance(result, GetTaskDict):
task.params = self.taskmap
elif isinstance(result, KillOs):
for tid in self.taskmap:
kill = self.taskmap.pop(tid, None)
if kill:
log.debug("Killing task %s", kill.name)
kill.target.close()
log.info("Goodbye cruel world, I am dying")
return
if isinstance(result, Signaler):
to = result.timeout
if isinstance(result, SendSignal):
self.sendsignal(result.signal, result.value)
# reschedule current task
elif isinstance(result, SendWaitSignal):
self.sendsignal(result.signal, result.value)
self.wait4signal(task, result.signal)
elif isinstance(result, Wait4Signal):
self.wait4signal(task, result.signal)
elif isinstance(result, Wait4Signals):
self.wait4signals(task, result.signals)
if to > 0:
## reschedule task for timeout
task.time2run = now + to
else:
continue # do not reschedule current task
self.schedule(task)
else:
self.idlecount += 1
machine.idle()
else:
self.idlecount += 1
machine.idle()
async def _idle_task(self):
while True:
await asyncio.sleep_ms(10)
idle() # Yield to underlying RTOS
def connect(net):
# Connect to WiFi network
wlan.connect(nets[net]['SSID'], auth=nets[net]['AUTH'], timeout=5000)
while not wlan.isconnected():
idle() # save power while waiting
print('Connected to ' + nets[net]['SSID'] + '!')
self.sta.connect(
env.get('wireless').get('ssid'),
env.get('wireless').get('password'))
count = 0
while not self.sta.status() == network.STAT_GOT_IP and count < 5:
utime.sleep_ms(500)
count += 1
try:
ntptime.settime()
except:
pass
if env.get('scenes'):
for item in env.get('scenes'):
self.scenes.add_sensors(item)
self.timer = Timer(0)
self.timer.init(mode=Timer.PERIODIC,
period=60000,
callback=self.read_sensors)
def read_sensors(self, t=None):
for scene in self.scenes.sensors:
for _id, data in scene.values():
publish(_id, data)
if __name__ == '__main__':
with open('env.json', 'r') as f:
device = Device(ujson.loads(f.read()))
while True:
idle()
def sleep_from_until (start, delay):
## while time.ticks_diff(start, time.ticks_ms()) < delay:
while time.ticks_diff(time.ticks_ms(),start) < delay:
machine.idle()
return start + delay
def switchchannel(c):
"""Push channel select button until desired state is reached"""
while pushchannel() != c:
machine.idle()
return c
def wait_not_busy(self):
while machine.mem32[stm.FLASH + stm.FLASH_SR] & 1 << 16:
machine.idle()
def start_transmissions(_pkts):
global lora
global index
global lora_sock
global active_tx
global active_rx
global my_slot
global proc_gw
global AppSKey
global succeeded
global retrans
global dropped
global join_start
global guard
global sack_rcv
global msg
global sack_bytes
airt = int(airtime_calc(my_sf,1,packet_size+2,my_bw_plain)*1000)
duty_cycle_limit_slots = math.ceil(100*airt/(airt + 2*guard))
proc_and_switch = 12000 # time for preparing the packet and switch radio mode (us)
if (int(MY_ID) == 22 or int(MY_ID) == 34): # fipy nodes switch faster
proc_and_switch = 10000
if (my_slot == -1):
join_start = time.ticks_us()
join_request(my_sf)
else:
sync()
repeats = 0
clock_correct = 0
sync_slot = int(airtime_calc(my_sf,1,sack_bytes+2,my_bw_plain)*1000+3*guard/2)
clocks = [sync_slot]
print("-----")
print("MY SLOT:", my_slot)
print("Net size:", index)
print("Time on air (ms):", airt/1000)
print("Guard time (ms):", guard/1000)
print("Duty cycle slots:", duty_cycle_limit_slots)
print("Default SACK slot length (ms):", sync_slot/1000)
print("Gw processing time (ms):", int(proc_gw/1000))
print("Time after SACK rec (ms):", (time.ticks_us()-sack_rcv)/1000)
i = 1
delays = []
delay = 0
(succeeded, retrans, dropped, active_rx, active_tx) = (0, 0, 0, 0.0, 0.0)
print("S T A R T")
while(i <= _pkts): # stop after pkts # of packets
print(i, "----------------------------------------------------")
start = time.ticks_us()
pycom.rgbled(green)
print("starting a new round at (ms):", start/1000)
# calculate the time until the sack packet (round_length)
if (int(index) > duty_cycle_limit_slots):
round_length = math.ceil(int(index)*(airt + 2*guard))
else:
round_length = math.ceil(duty_cycle_limit_slots*(airt + 2*guard))
if (len(delays) > 0):
delay = sum(delays) / len(delays)
round_length += delay + proc_gw # clock delays + gw proc time (us)
t = (my_slot*(airt + 2*guard) + guard - proc_and_switch) # sleep time before transmission
print("sleep time (ms):", t/1000)
pycom.rgbled(off)
# time.sleep_us(int(t))
machine.sleep(int(t/1000), 0) # light sleep mode
_thread.start_new_thread(generate_msg, ())
pycom.rgbled(red)
on_time = time.ticks_us()
lora.init(mode=LoRa.LORA, tx_iq=True, region=LoRa.EU868, frequency=freqs[my_sf-5], power_mode=LoRa.TX_ONLY, bandwidth=my_bw, sf=my_sf, tx_power=14)
pkg = struct.pack(_LORA_PKG_FORMAT % len(msg), MY_ID, len(msg), msg)
print("Sending packet of", len(pkg), "bytes at (ms):", (time.ticks_us()-start)/1000)
lora_sock.send(pkg)
pycom.rgbled(off)
lora.power_mode(LoRa.SLEEP)
active_tx += (time.ticks_us() - on_time)
t = round_length - (time.ticks_us() - start)
if t < 0:
t = 0
print("cannot align clock!")
print("sleep time after data (s):", t/1e6, "/ clock correction (ms):", clock_correct/1000)
# time.sleep_us(int(t))
machine.sleep(int(t/1000), 0) # light sleep mode
rec = 0
sack_rcv = 0
clock_correct = 0
acks = ""
lora_sock.setblocking(True)
lora.init(mode=LoRa.LORA, rx_iq=True, region=LoRa.EU868, frequency=freqs[my_sf-5], power_mode=LoRa.ALWAYS_ON, bandwidth=my_bw, sf=my_sf)
sync_start = time.ticks_us()
print("started sync slot at (ms):", time.ticks_ms())
pycom.rgbled(white)
lora_sock.settimeout(sync_slot/1e6)
try:
while (rec == 0):
machine.idle()
sack_rcv = time.ticks_us()
recv_pkg = lora_sock.recv(255)
if (len(recv_pkg) > 2):
recv_pkg_len = recv_pkg[1]
recv_pkg_id = recv_pkg[0]
if (int(recv_pkg_id) == (my_sf-5)):
sack_rcv = time.ticks_us()
lora.power_mode(LoRa.SLEEP)
active_rx += (time.ticks_us() - sync_start)
wt = sack_rcv-sync_start-airtime_calc(my_sf,1,recv_pkg_len,my_bw_plain)*1000
print("Waiting time before receiving SACK (ms):", wt/1000)
if (wt != guard) and (i > 1):
delays.append(wt-guard)
if (len(delays) > 3):
delays.pop(0)
clock_correct = wt - guard
try:
dev_id, leng, s_msg = struct.unpack(_LORA_RCV_PKG_FORMAT % recv_pkg_len, recv_pkg)
s_msg = str(s_msg)[2:][:-1]
(index, proc_gw, acks) = s_msg.split(":")
(index, proc_gw) = (int(index), int(proc_gw)*1000)
print("SACK received!", s_msg)
print(lora.stats())
if (acks != ""):
acks = zfill(bin(int(acks, 16))[2:], index)
if (acks[my_slot] == "1"):
print("ACK!")
succeeded += 1
repeats = 0
else:
print("I will repeat the last packet")
retrans += 1
repeats += 1
i -= 1
if (repeats == 4):
print("Packet dropped!")
repeats = 0
dropped += 1
retrans -= 1
i += 1
machine.idle()
rec = 1
ack_lasted = time.ticks_us()-sync_start
if (i == 1): # what if the first packet is dropped. I have to fix this
clocks = [ack_lasted]
else:
clocks.append(ack_lasted)
sync_slot = int(sum(clocks)/len(clocks))
if (len(clocks) == 10):
clocks = pop(0)
print("new sync slot length (ms):", sync_slot/1000)
except:
print("wrong SACK format!")
pass
except:
if (rec == 0):
lora.power_mode(LoRa.SLEEP)
active_rx += time.ticks_us() - sync_start
print("I will repeat the last packet")
retrans += 1
repeats += 1
i -= 1
if (repeats == 4):
print("Packet dropped!")
print("Synchronisation lost!")
repeats = 0
dropped += 1
retrans -= 1
i += 1
pycom.rgbled(red)
time.sleep_us(int(round_length-sync_slot-proc_gw))
sync()
clock_correct = 0
print("sync slot lasted (ms):", (time.ticks_us()-sync_start)/1000)
print("time after SACK (ms):", (time.ticks_us()-sack_rcv)/1000)
print("round lasted (ms):", (time.ticks_us()-start)/1000)
print("transmitted/delivered/retransmitted/dropped:", i, succeeded, retrans, dropped)
print("radio active time (rx/tx) (s):", active_rx/1e6, "/", active_tx/1e6)
i += 1
# send out stats
print("I'm sending stats")
stat_msg = str(i-1)+":"+str(succeeded)+":"+str(retrans)+":"+str(dropped)+":"+str(active_rx/1e6)+":"+str(active_tx/1e6)
pkg = struct.pack(_LORA_PKG_FORMAT % len(stat_msg), MY_ID, len(stat_msg), stat_msg)
for x in range(3): # send it out 3 times
lora.init(mode=LoRa.LORA, tx_iq=True, region=LoRa.EU868, frequency=freqs[7], power_mode=LoRa.TX_ONLY, bandwidth=LoRa.BW_125KHZ, sf=12, tx_power=7)
pycom.rgbled(blue)
# while (lora.ischannel_free(-90) == False):
# print("Channel is busy!")
# random_sleep(5)
lora_sock.send(pkg)
lora.power_mode(LoRa.SLEEP)
random_sleep(10)
pycom.rgbled(off)
def wait_not_busy(self):
while machine.mem32[stm.FLASH + stm.FLASH_SR] & _Flash._FLASH_SR_BSY_MASK:
machine.idle()
import machine
from network import WLAN
import time
import socket
import utime
wlan = WLAN(mode=WLAN.STA)
nets = wlan.scan()
for net in nets:
if net.ssid == 'FabLab':
print('Network found!')
wlan.connect(net.ssid, auth=(net.sec, 'MakerFaire'), timeout=5000)
while not wlan.isconnected():
machine.idle() # save power while waiting
print('WLAN connection succeeded!')
break
rtc = machine.RTC()
rtc.init((2015, 1, 1, 1, 0, 0, 0, 0))
print("Before network time adjust", rtc.now())
print('Setting RTC using Sodaq time server')
s=socket.socket()
addr = socket.getaddrinfo('time.sodaq.net', 80)[0][-1]
s.connect(addr)
s.send(b'GET / HTTP/1.1\r\nHost: time.sodaq.net\r\n\r\n')
ris=s.recv(1024).decode()
s.close()
rows = ris.split('\r\n') # transform string in list of strings
seconds = rows[7]
def check_for_updates(ssid, password, app_url):
import network
import machine
import os
from time import sleep
# activate wifi module in station mode
wlan = network.WLAN(network.STA_IF)
wlan.active(True)
# status indicator
led = machine.Pin(2, machine.Pin.OUT)
led.off() # turn led on
try:
# iterate through available networks
for s in wlan.scan():
if s[0].decode('utf-8') == ssid:
print('Network found!')
wlan.connect(ssid, password)
while not wlan.isconnected():
machine.idle()
print('WLAN connection succeeded!')
# 2 times led blink to indicate, network connected
for i in range(2):
led.on()
sleep(0.1)
led.off()
sleep(0.1)
led.on() # finally turn off the led
try:
import urequests
except:
import upip
upip.install("micropython-urequests")
import urequests
# check for updates
res = urequests.get(app_url).text
current_version = '0.0'
with open("app.py", "r") as f:
current_version = f.read().split("\n")[0].lstrip("#v")
fetched_version = res.split("\n")[0].lstrip("#v")
print("Fetched: v{}, Current: v{}".format(
fetched_version, current_version))
if fetched_version == current_version:
print("Not updating current app")
else:
print(
"Updating current app to v{}".format(fetched_version))
# 5 times long-short led blink to indicate, app update running
for i in range(5):
led.off()
sleep(0.5)
led.on()
sleep(0.1)
led.on() # finally turn off the led
with open("app.py", "w") as f:
f.write(res)
# 2 times short led blink to indicate, app update finished
for i in range(2):
led.off()
sleep(0.1)
led.on()
sleep(0.1)
led.on() # finally turn off the led
except Exception as e:
print(e)
# if error is about scan failed, don't use led indicator
if str(e) != "scan failed":
# 7 times long-short led blink to indicate, error occured
for i in range(7):
s = 0.5 if i % 2 == 0 else 0.1
led.off()
sleep(s)
led.on()
sleep(0.5)
led.on() # finally turn off the led
wlan.active(False)
led.on() # finally turn off the led
def settimeout(duration):
pass
def on_message(topic, msg):
print("topic is: " + str(topic))
print("msg is: " + str(msg))
wlan = WLAN(mode=WLAN.STA)
nets = wlan.scan()
for net in nets:
if net.ssid == wifi_ssid:
print("Network " + wifi_ssid + " found!")
wlan.connect(net.ssid, auth=(net.sec, wifi_passwd), timeout=5000)
while not wlan.isconnected():
#machine.idle() # save power while waiting
idle() # save power while waiting
print("WLAN connection succeeded!")
print (wlan.ifconfig())
break
client = MQTTClient(MYDEVID, broker_addr, 1883)
if not client.connect():
print ("Connected to broker: " + broker_addr)
client.set_callback(on_message)
client.subscribe("sensors/")
print("Checking messages ...")
while 1:
client.check_msg()
def init():
sta_if.connect(ssid, password)
while not sta_if.isconnected():
machine.idle() # save power while waiting
def sleep_from_until(start, delay):
while time.ticks_diff(start, time.ticks_ms()) < delay:
machine.idle()
return start + delay
def takeANap():
"""Hang a few milliseconds"""
#machine.sleep(0.01)
#machine.lightsleep(10)
machine.idle()
time.sleep_ms(10)
#Read the button, if pressed then not in deepsleep mode and connected to your wifi (to avoid many problem to update your code)
bouton = Pin('G4', mode=Pin.IN, pull=Pin.PULL_UP)
if bouton() == 0 or True: #TODO
pycom.rgbled(0xff9900) #orange
from network import WLAN
wlan = WLAN(mode=WLAN.STA)
nets = wlan.scan()
for net in nets:
if net.ssid == 'TP-LINK_2.4GHz':
print('SSID present.')
wlan.connect(net.ssid,
auth=(net.sec, 'werbrauchtschoninternet'),
timeout=5000)
while not wlan.isconnected():
machine.idle()
print('Connetion WLAN/WiFi OK!')
print("Sync time.")
rtc.ntp_sync("pool.ntp.org")
while not rtc.synced():
print("Wait to be in sync")
time.sleep(10)
print("RTC is in sync. ", rtc.now())
# machine.main('main2.py')
# machine.main('main.py')
break
else:
pycom.rgbled(0x7f0000)
# machine.main('main.py')
machine.main('main.py')
def WaitforReady(self):
while self.pin_hrdy.value() == 0:
machine.idle()
from machine import UART
import machine
import os
from network import WLAN
uart = UART(0, baudrate=115200)
os.dupterm(uart)
wifi_ssid = 'YOURWIFISSID'
wifi_pass = '******'
if machine.reset_cause() != machine.SOFT_RESET:
wlan = WLAN(mode=WLAN.STA)
wlan.connect(wifi_ssid, auth=(WLAN.WPA2, wifi_pass), timeout=5000)
while not wlan.isconnected():
machine.idle()
machine.main('main.py')
def wifi_connect():
wlan.connect(ssid, auth=(WLAN.WPA2, password), timeout=5000)
while not wlan.isconnected():
machine.idle()
cfg = wlan.ifconfig()
print('WLAN connected to ip {} gateway {}'.format(cfg[0], cfg[2]))
